Btrfs: make sure that we've made everything in pinned tree clean

Since we have two trees for recording pinned extents, we need to go through both of them to make sure that we've done everything clean. Signed-off-by: Liu Bo <[email protected]> Signed-off-by: Chris Mason <[email protected]>
mrcsosa · Jun 15, 2012 · ed0eaa1 · ed0eaa1
1 parent 6e841e3
commit ed0eaa1
Showing 1 changed file with 11 additions and 0 deletions.
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
@@ -3557,8 +3557,10 @@ static int btrfs_destroy_pinned_extent(struct btrfs_root *root,
 	u64 start;
 	u64 end;
 	int ret;
+	bool loop = true;
 
 	unpin = pinned_extents;
+again:
 	while (1) {
 		ret = find_first_extent_bit(unpin, 0, &start, &end,
 					    EXTENT_DIRTY);
@@ -3576,6 +3578,15 @@ static int btrfs_destroy_pinned_extent(struct btrfs_root *root,
 		cond_resched();
 	}
 
+	if (loop) {
+		if (unpin == &root->fs_info->freed_extents[0])
+			unpin = &root->fs_info->freed_extents[1];
+		else
+			unpin = &root->fs_info->freed_extents[0];
+		loop = false;
+		goto again;
+	}
+
 	return 0;
 }